I must say, this is a perfect example of an allegory. 340 chapters deep and GANTZ is basically near its end. With the story-line split into 3 parts/phases, GANTZ is currently on its finale phase (which started in chapter 304).
It was around 2005 or 2006 when I first picked up the manga and instantly became smitten by it. Amazing character development, well thought out pacing, interesting design(mainly the aliens and the weaponry), and a cool ass sci-fi concept. I was hooked like a crack fiend.
When flipping through older volumes, I notice great deal of changes that spans over a decade. Its very prevalent in the art.